[Dovecot] pigeonhole and utf-8 error

[Xavier Pons]

  El 17/08/2010 18:57, Timo Sirainen escribió:
> On Tue, 2010-08-17 at 09:35 +0200, Xavier Pons wrote:
>
>>   >Aug 17 09:22:40 imap1 dovecot: lmtp(19629,miel): Error:
>> kea6K484akytTAAAJBW4rA: sieve: msgid=
>>   ><1099311971.505.1282029699154.JavaMail.open-xchange at o.uib.es>: failed
>> to store into mailbox 'atenció':>mailbox name not utf-8: atenció
>>
>> dovecot it's working without problem on this folder.
>> I suppose it's a misconfiguration, but I don't find where...
> I guess you wrote the script with ISO-8859-x charset or something
> instead of UTF-8.
>
>

my default system LANG is 'en_US.UTF-8'.
Also, I have tried to edit this filter with  'vi "+set encoding=utf-8" 
sievefilter' , and
the folder name it's correctly writed/displayed, but when it's executed 
from dovecot lmtp
give me this error.

I'm using dovecot with default mUTF-7 encoding, and in the pigeonhole 
configuration I didn't
see nothing related to encoding charset .
Could I configure dovecot to work with UTF-8 instead mUTF-7? this could 
help to resolve this
problem? Nowadays  It's recommended to use UTF-8 for non-english 
configurations?

thanks

Xavier